linux-kernel - Re: [PATCH v3] virtio_vsock: Fix race condition in virtio_transport_recv

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Date:   Sat, 30 May 2020 12:40:42 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Jia He <justin.he@....com>, kvm@...r.kernel.org,
        netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Kaly Xin <Kaly.Xin@....com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>
Subject: Re: [PATCH v3] virtio_vsock: Fix race condition in
 virtio_transport_recv_pkt()

> This fixes it by checking sk->sk_shutdown(suggested by Stefano) after
> lock_sock since sk->sk_shutdown is set to SHUTDOWN_MASK under the
> protection of lock_sock_nested.

How do you think about a wording variant like the following?

  Thus check the data structure member “sk_shutdown” (suggested by Stefano)
  after a call of the function “lock_sock” since this field is set to
  “SHUTDOWN_MASK” under the protection of “lock_sock_nested”.


Would you like to add the tag “Fixes” to the commit message?

Regards,
Markus